1. ![](http://irbiscorp.spsl.nsc.ru/webirbis-htdocs/images/printer.jpg)
|
Aplesnin, S. S. Nonadiabatic interaction of acoustic phonons with spins S=1/2 in the two-dimensional Heisenberg model / S. S. Aplesnin> // J. Exp. Theor. Phys. - 2003. - Vol. 97, Is. 5. - P. 969-977, DOI 10.1134/1.1633952. - Cited References: 18
. - ISSN 1063-7761РУБ Physics, Multidisciplinary Рубрики: QUANTUM MONTE-CARLO EU2CUO4 GD2CUO4 POLARON Кл.слова (ненормированные): Antiferromagnetic materials -- Correlation methods -- Crystal symmetry -- Magnetic couplings -- Magnetic moments -- Magnetization -- Monte Carlo methods -- Quantum theory -- Acoustic phonons -- Nonadiabatic interaction -- Orthorhombicity -- Quantum spin liquid transitions -- Phonons Аннотация: The ground state of a two-dimensional antiferromagnet having spins S = 1/2 and interacting with acoustic phonons is investigated in the nonadiabatic approximation using the quantum-mechanical Monte Carlo method. The critical parameters of the spin-phonon coupling, corresponding to the formation of bound spin-phonon excitations, crystal symmetry lowering, and the emergence of a gap in the spin excitation spectrum, as well as the antiferromagnet-quantum spin liquid transition, are determined. The orthorhombicity parameter, the sublattice magnetization, the violation of the spherical symmetry of spin-spin correlation functions, and the magnetic moment in Gd2CuO4 and Eu2CuO4 are calculated. (C) 2003 MAIK "Nauka / Interperiodica".
WOS, Scopus, Читать в сети ИФ Держатели документа: Russian Acad Sci, Siberian Div, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia ИФ СО РАН Kirenskii Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgoivdok, Krasnoyarsk, 660036, Russian Federation Доп.точки доступа: Аплеснин, Сергей Степанович } Найти похожие
|